grid.py 文件源码

def set_nodata(self, data_name, new_nodata, old_nodata=None):
        """
        Change nodata value of a dataset.

        Parameters
        ----------
        data_name : string
                    Attribute name of dataset to change.
        new_nodata : int or float
                     New nodata value to use.
        old_nodata : int or float (optional)
                     If none provided, defaults to
                     self.grid_props[data_name]['nodata']
        """

        if old_nodata is None:
            old_nodata = self.grid_props[data_name]['nodata']
        data = getattr(self, data_name)
        np.place(data, data == old_nodata, new_nodata)
        self.grid_props[data_name]['nodata'] = new_nodata